But Indian's WiFi Auto On and Auto Off are already both shown as Off. So perhaps toggle them On then Off again and see what happens.
Or is it actually the cloud service that is starting his WiFi (I am not interested in cloud so have never switched it on)? If so, and if Indian needs the cloud service, then the comment by EGS is the one to go for to prevent auto connection to his phone. And if Indian needs the cloud service, how does it connect to the server if not through his phone?
All I can add is that neither of my 760S 2CH's switch on WiFi unless I use the button to do it manually. And as they are OFF, obviously, my phone does not auto connect.